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sunjie2668

ľ³æ (СÓÐÃûÆø)

[ÇóÖú] x^2+3*y+e^z=0Ôõô»­Z¹ØÓÚX,YµÄÈýάͼ£¬ÇóÖ¸½Ì ÒÑÓÐ5È˲ÎÓë

x^2+3*y+e^z=0Ôõô»­Z¹ØÓÚX,YµÄÈýάͼ£¬ÇóÖ¸½Ì
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dnp

ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)

Сľ³æÀË×Ó

ÓÅÐã°æÖ÷

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xzhdty: ½ð±Ò+1, ллӦÖú 2014-07-17 11:53:39
sunjie2668: ½ð±Ò+5, ¡ïÓаïÖú 2014-07-17 16:04:12
CODE:
>> [X,Y] = meshgrid(-5:.1:5, -5:.1:5);
>> Z = exp(-X.^2 - 3*Y);  
>> surf(X,Y,Z) % figure 1
>> x = -5:.1:5;
>> y = -5:.1:5;
>> z = exp(-x.^2 - 3*y);
>> plot3(x,y,z) % figure 2
>> grid on
>> mesh(X,Y,Z) % figure 3

ÁíÍ⣬matlab°ïÖúÎĵµÓÐÀàËÆµÄÀý×Ó£¬ÓÃÒÔÏ´úÂë¾Í¿ÉÒÔ¿´µ½¡£
CODE:
doc meshgrid

What would Jesus do?
2Â¥2014-07-17 11:28:19
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bashan

½û³æ (ÕýʽдÊÖ)

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
±¾ÌûÄÚÈݱ»ÆÁ±Î

3Â¥2014-07-17 22:32:03
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangÏ£½Ü

гæ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
model:

sets:
    QUARTERS/1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21/:x,y,c,w,p,b,q,f;
    KIND/1,2,3,4/:z;
    LINK(QUARTERS,KIND):a;
  
endsets
data:
c=5.000,4.613,4.257,3.928,3.624,3.344,3.085,2.847,2.627,2.423,2.236,
  2.0632,1.904,1.756,1.621,1.495,1.380,1.273,1.175,1.084,1.000;
p=0.0000,0.0001,0.0002,0.0002,0.0003,0.0005,0.0007,0.0011,0.0017,0.0025,0.0037,0.0055,
  0.0082,0.0127,0.0181,0.0271,0.0404,0.0602,0.0899,0.1341,0.2000;
enddata
init:
f(1)=0;b(1)=0;q(1)=0;M=2;V=1;
endinit


@for(LINK(i,j):w(i)=a(i,1)*20*x(i)+a(i,2)*(18*x(i)+800)+a(i,3)*(15*x(i)+4400)+a(i,4)*(31400-(x(i)-1800)*V)+(a(i,1)+a(i,2)+a(i,3))*q(i)-f(i)*V -y(i)*c(i));
max=@sum(QUARTERS(i):w(i));
@for(QUARTERS(i):@SUM(KIND(j):a(i,j))=1);
@for(LINK:@bin(a));
@for(LINK(i,j):a(i,1)=@if(x(i)#le#400,1,0);a(i,2)=@if(x(i)#le#1200#and#x(i)#gt#400,1,0);a(i,3)=@if(x(i)#le#1800#and#x(i)#gt#1200,1,0);a(i,4)=@if(x(i)#le#20000#and#x(i)#gt#1800,1,0));
@sum(QUARTERS(i):y(i))<=20000;
@for(QUARTERS(i):x(i)=y(i)*(1-p(i)));
@for(QUARTERS(i):0<=b(i)<=(1800-x(i)));
@for(QUARTERS(i):0<=f(i));
@for(QUARTERS(i)|i#GT#1#and#i#le#21:f(i)=f(i-1)-b(i)+x(i-1)-1800);
@for(LINK(i,j):q(i)=b(i)*(a(i,1)*(20-M)+a(i,2)*(18-M)+a(i,3)*(15-M)));

end
4Â¥2014-07-18 08:49:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

sxf2012

ľ³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
[code]
ezmesh('log(-x^2-3*y)')
[\code]
5Â¥2014-07-18 12:02:27
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

BIT6019

гæ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

½¨ÒéÄã¼ÓÈëshading interpÕâ¾ä»°£¬ÕâÑù³öÀ´µÄͼ¸üÃÀ¹Û
6Â¥2014-12-17 18:29:41
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